Liquid fuel burner



pril 26, 1932.

F. H. CORNELIUS LIQUID FUEL BURNER Filed April 17, 1928 4 Sheets-Sheet 1INVENTOR Wan/f h. Cornelius BY i ATTQRN? 4 Shets-Sheet 2 Filed April 17,1928 w RM. n w 4/ my Wm M A KY mm m PM 7 8 .N 4. QWMWN b? 3 m i Q Q? w muh m 9v n N mm April 26, 1932- F. H. CORNELIUS 855,339

LIQUID FUEL BURNER Filed April 17, 1928 4 Sheets-Sheet 3 INVENTbR Haw/f)i Corfie/ius BY ATTORNEY April 26, 1932. F. H. CORNELIUS LIQUID FUELBURNER Filed April 1'7, ,1928

4 Sheets-Sheet 4 2!: 4w I l i I, I 9 L I F}; {i v 102 -I It F16. 7

INVENTOR f'Kfl/YK -/i (OH/EH05.

"BYZ w g ATTORNEY Patented Apr. 26, 1932 r FRANK HQC ORNELIUS, OFSWISSV'ALE, PENNSYLVANIA.

. LIQUID FUEL BURNER Application filed April 17,

My invention relates to fuel burners and more'particularly to burnersemploying oil as a fuel.

One object of my invention is to provide aburner of the above describedtype that shall generate a current of air, both for procuring thepropulsion of the atomized fuel andt e complete combustion thereof.Another object of my invention is to provide an oil burner that shall besealed into the wall of a furnace so that substantially all of the airrequired for combustion will be su plied by the burner.

till another object of my invention is to provide a burner of the abovedescribed type that is sealed into the wall of the furnace that shallcomprise a ventilatingmeans in the enclosed casing of the burner that isactuated to open position by the current of air gencrated within theburner.

A further object of my invention is to provide a sealed furnace withdamper means in the flue and in the burner casing that shallautomatically be closed or opened to corthereby prevent the fire box ofthe furnace from being cooled by a passage of air therethrough when thesource of heat is cut-ofi'.

A still further object of my inventionis to provide an enclosed burnerof the above described type having air compressing means that shallcompress the air in different stags; the one stage supplying secondary,air for combustion; the other stage of higher pressure being employedto propel the atomized fuel and to supply some of the air forcombustion.

A still further object of my invention is to provide a burner, havingdifferent stages of compressed'air, with'damper means in the air passagethereof that shall provide regulation between the air supplies in orderto assure complete combustion at all times.

A still further object of my invention is;

to provide an oil burner of the above described type that shall supplyoil forcombustion, without passin the oil through a needle valve orother 0 structionable structure.

Still another object of my invention is to respond with the status ofthe burner to 1928. Serial No. 270,605.

provide a reservoir for a burner of-the above described type having anadjustable. oil leveling device that shall provide a predeterminedheight of oil therein from which a supply is provided to the atomizingcup.

A still further object of my invention is to provide a reservoir foroilassociated with a. burner of the above described type that shall beraised into supply position when the burner is in operation and shall belowered to out of supply position when the burner is shut down.

Heretofore, oil burners employed in the art provided a current of air toatomize or spray the fuel into the combustion chamber. Openings wereleft about the burner in the entrance of the combustion chamber throughwhich the -oxygen required for combustion was supposed to beautomatically supplied. I have found by experiment, however, that thedifficulty experienced in obtaining complete combustion in oil burnershas been caused by the lack of oxygen required to obtain correctcombustion. This failure of the air supply through the said opening fromtime to time was probably caused by a stoppage in the flue, humidity inthe atmosphere,

7 the location and height of the chimney or of any one or a combinationof the various causes of poor drafts.

In practising my invention I provide an oil burner in which the air foratomization is supplied in a manner somewhat similar to that found inthe art, but is combined with the additional structure that supplies allof the air required for combustion. Regulating means is supplied for theair at several parts of the structure so that complete combustion isassured under all conditions. I am able to accomplish this result bycompletely enclosing the burner end of my structure within thecombustion chamber which thereby receives air only through the source ofsupply within the burner, a sufficiency of which is always assured whenthe burner is in operation.

The above said construction provides further novelty to my invention asregulating 5 means may be supplied both on the burner and on the flue.so that the air is completely shut off from the heated combustionchamber 100 referring to the drawings in which: c

Figure l is a diagrammatical view of a comlete installation and of aburner embodyin my invention.

igures 2, 3 and 4 are views in elevation of in. articular form of myburner taken from its si e rear and front, respectively.

Figure 5 is a side view partlyinelevation and part1 in section of aparticular form of a complete burner unit.

Figu taker along the line VI-VI of Figures 5' and.

Figure 7 is a sectional view taken along the line VII-VII of Figure 6.

Figure 8 is a sectional view of the particu' lar embodiment of myinvention taken along the line VIII--VIII of Figures5 and 9.

Figure 9 is a sectional view of the structure taken along the line IX-IXof Figure 8.

Figure 10 is a view in elevation of my venting means showing aparticular embodiment thereof.

Figure 11 is a sectional view taken along the line XI-'-XI'of Figure 10.

Figure 12 is a side view of my venting arrangement shown in Figure 10.

, My invention comprises in general a casing 1 that supports a stator 2of an electric motor having a rotor 3, mounted on a shaft 4, that issupported on bearings 5 and 6 and is the means for operating the burnerthat will now be described in detail.

The casing 1 is provided with an extended portion 7 that forms the rearwall of a low compression chamber 10 that is formed by a cover portion8.' The front surface of the cover portion 8 forms the rear wall of asecond stage or high compression chamber 11 that is enclosed by a coverportion 12. The cover portion l2contains an extended por-. tion or airpassage 13 that will be more fully described hereinafter.

'A rotating fan or blade member 14 is contained within the low stagecompression chamber 10 and is mounted on the shaft 4 by means of a hub16 that is secured thereto by set screws 17. The high stage compressionchamber 11 encloses a fan or blade member 18 that is supported on theshaft 4 by means of a hub 19 and set screw 21.

Referring to Figure 8, the cover portion 8 is shown in sectiondisclosing air-directing vanes 22 that direct the air supplied by theblades 14. into the provided passages.

The air supplied from the exterior of casing 1 passes around and coolsthe motor as re 6 is a sectional view of the burner- .lation similartothat disclosed in Fi blades 14 through a central annular opening 23into the chamber 11 or into openings 24 for a purpose that will behereinafter related.

The air passing through the orifice 23 is further compressed by therotating fan 18 and is directed by the vanes 22, contained within theface of the cover 12, into the air conduit 13 at a high velocity, thepurpose of which will be described hereinafter.

Figures 5 to 9 clearly disclose the different types of blades orrotating fans that are reuired to produce the volume or pressure in t e'different air supplies. The short, broad blades 14 are employed to movea large body of air and to compress it only a minimum amount. The blades18 are narrow but long and operate on that part of the air supplied bythe blades 14 through the opening 23, to produce a much greater degreeof com ression. From many experiments thatl ave made I have found thatblades bearing a reures 5; to 9 are the most economical in suppiying airfor both atomization and combustion. 1' single fan member might beemployed to comress the air to the maximum degree required orfuel'propulsion allowing an amountto expand to be employed in a mannersimilar to my above described secondary air but tests have proven thatthis method is not as economical as that produced by my preferredstructure.

The front end of the shaft 4 contains a threaded portion 25 to which anatomizing cup 26 is attached and which is substantially similar toatomizin cups that have heretofore been supplied in the art. The sidesof the cup 26 slope outwardly toward the front and terminate at the rearor su port end in a projection or flange portion 2r that is employed toprevent the oil from flowing over this end and thereby forces the oil topass along the S10 ing sides towards the front end of the cup. oles 28are provided in mounting hub 29 of the cup 26 to permit a constant flowof oil into the front end of the cup.

The front end of the cup 26 terminates in a sloping portion 31 thatforms a knife edge 32 around the rim of the cup 26. The object of thissharp edge 32 is to permit the oil to leave the rim of the cup in aspray rather than permit it to collect thereon in drops and to be throwntherefrom in sludges rather than in a complete atomized state that isrequired to produce good combustion.

The air passage or conduit 13 projects substantially to the end of thecup 26 and contains a rib portion 33 that supports the bearings 6 andthe shaft 4 that is aligned substantially centrally thereto. The end ofthe outer surface of this passage 13 contains a threaded portion 30 onwhich an annular slopthrown centri distance at which the air compressionchamber is before strikin provided to adapt my burnerso that it mayemploy different grades of oil as a fuel and also to divergethe flame toadapt it to various shaped combustion chambers within which it may beemployed.

Completely enclosing the air conduit 13 secondary air conduit 35 thatsupplies the addltlonal air for the complete combustion of the atomizedfuel and which is directed into the-furnace substantially concentric totheair conduit 13. This air supply passes from the lowcompressionchamber 10 through the orifices 24 heretofore mentioned andpasses through a similar orifice 36 in the walls of the high compressionchamber 11, although not being in direct communication therewith, andpasses into the secondary air conduit 35. The passages 24 contain adamper 40 that is operated by the rods 37 to regulate the amount ofsecondary air supplied to the conduit 35. By this means the exact amountof secondary .air to produce complete combustion is obtained.

I will now describe my novel method of supplying the fuel tothe'atomizing cup in which needle valves and other means of possibleobstruction are eliminated from the supply line. The rear or oppositeend of the said shaft 4 is provided with a hub member 41 that conta nsan enlarged portion on its outer end that is circular in shape andcomprises; sides'42 beveled toward its outer circumference.' A flexibleconnection 43 is attached to the hub 41 forming a flexible connectionwith a hub 44.

Thehub 41 revolves within a chamber 46 that forms the closure member forthe rear end of easing 1. The lower portion of the chamber 46 comprisesa well 54 for the oil,

the height of which is regulated by a lGVGllllg device 48 that will bedescribed hereinafter. The. upper portion of the chamber 46 comprises aslot portion 51 aligned with the beveled edge 42 of the hub 41 and isconnected to an 011 conducting conduit The level of the oil in the wellis regulated to have the said beveled edge 42 revolve therein and tothrow the oil ceutrifugally into the slot 51, thereby passing it bymeans of the conduit 52 and a conduit line 53, through which it iscarried by gravity, into an annular orifice 55, from which it willreadily flow ,into the atomizing cup 26.

An aperture 50 maybe provided in the wall of the chamber 46 throughwhich air burner is in operaof reduced pressure the housing 46. I inapprcciablerand substantially con;-

tion, producing an area above the well 54 within have found thisreduction as the motor operates at stant sipeed the reduced pressureraises the level 0 oil in the well 54 until it engages the beveled sidesof the hub 42. I employ this means ofdisconnecting the oil suppl as asafety device to prevent a supply of oi from flowing into the atomizingcup and the air passages after the burner is shut down.

When the aperture 50 is employed the oil level in the well is below thebeveled side 42 and is distant therefrom such an amount that the rise ofthe level when the burner is in operation will be in proportion to theair supply which will vary with the speed of operation of the motor.Thus, when the motor is building up speed or is slowing down, the oilsupply will be increased or diminished in an exact predetermined mannerproportionate to the amount of air flowing. That is to say, when themotor is slowing down the pressure within the chamber 46 is immediatelyincreased with a corresponding lowering of the level-of the oil in thewell 54, and the supply to the atomizing cup is diminished.

In this manner, the flame of the burner is a put out because of theshutting ofli of the Oil supply and not because of the lack of atomizingair that heretofore caused oil to be fed to the combustion chamber afterthe flame of the burner was extinguished.

To provide a means of supply for the well 54 a fuel reservoir 48 isprovided containing regulating means for varying the levels of the oilin the well 54. Oil is supplied to the res ervoir 48 by one side of atwirl pump 45 that is connected and operated by the hub 44 of theaforesaid universal joint on the rear end of the shaft 4. The supplyside of the pump 45 provides an excess amount of oil to the reservoir 48so that a suflicient supply will be on hand at all times.

A pipe 47 connects the bottom of the reservoir 48 to the lower extremityof the chamber 46. An overflow connection is located at the bottom ofthe reservoir 48 and is connected to the return side of the pump 45. Anextension 49 is so associated'wit-h the connection (30 that it may beraised or lowered through the greater part of its length. By this means,the height of the oil in the reservoir 48 will be that of the overflowor height of the extension 49. As the reservoir 48 is in communicationwith the chamber 54 the height of the oil in the chamber 54 will be thesame as that of the reservoir 48. Thus of greater or less-viscosity isemployed. than that for which the oil level was originally provided.

The high compression air passage 13 has on its upper wall the arcingterminal lugs 58 I provided and 59 that support the arcing terminals 61and 62, respectively. The lug 59 is directly connected to the metal ofthe passage 13,

while the lug 58 is supported on the insulating member 63 to insulatethe terminal 61 therefrom. i

A high voltage transformer 64 is provided on the rear of the burner andis grounded to the casing 1, the other terminal of which is connected tothe terminal 61 by a high voltage lead 60. By this means a spark may beat the tips 65 of the arcing terminals 61 and 62 that may be em loyed toignite the atomized fuel at the iieginnin of each operation of theburner. Hereto ore, it has been impossible in the art to provide adirect means of igniting the fuel oilsupply from an oil burner of theatomizing type. The intensity of the heat so )rovided would destroy thearcing contacts t lat must necessarily be in the vicinity of theatomizing cup in order to. ignite the rapidly moving fuel. By placing myarcing contacts 61 and 62 within the secondary air passage 35 abovedescribed, I am able to sufiiciently cool them and at the same timeposition them adjacent to the atomizing cup 26 without having themdestroyed by the ensuing flame.

A cover 66 that may be of cast metal or of sheet iron construction isprovided, entirely enclosing the rear portion of the casing 1, the highvoltage transformer 64, the reservoir 48 and the pump 45. A plurality ofbolts 38 are employed to unite the covers 8 and 12 of the compressionchambers 10 and 11 and a similar group of bolts 39 are employed in theexpanded portion of the secondary air conduit 35 to make a completeunitary structure of the air conduits 13 and 35, the compressionchambers 10 and 12, the casing 1 and the cover 66.

The cover 66 is provided with an automatic damper 67 shown in Figure 1that may be of any design that will be automatically operated by aninflow of air produced by the operation of the fans 14 and 18. The formpreferred is shown in Figures 10, 11 and 12 in which a frame 68 is themeans for supporting the housing or rectangular shaped frame 69,, inwhich the louvres 71 are pivotally supported they freely swing. theburner is not operating the louvres 71 are not attracted to their openposition, as shown in Figure 12, but are in a lower or closed position,as shown in Figure 11. The louvres 71 are provided with a fibre or feltstrip 72 on its lower most. end that abuts against the longitudinallydisposed rods 73 to form a tight seal therewith.

The outer portion of the frame 68 is pro vided with a screen covering 74 to protect the louvres 71 from being distorted by any substance thatmight be inadvertently thrown thereagainst and to prevent the air onrods 73 and upon which In normal position when currents passingtherethrough from carrying paper or any other like material to withwithin the above described compression 'sys' tem', a damper 7 5 isprovided in the lower portion of the housing at the mouth of an" iopening 76 by which means the air drawn" through the frame 68 in thecasing 66 may be regulated to vary the amount of supply furnished to theburner.

A frame 77, similar to that of the above described frame 68, with theexception that the louvres 71 thereof are arranged to operate with aless ressure than required to operate the louvres 1 of the frame 68, isprovided in the flue of the furnace as shown in Figure 1. Thisdifference of operation may be accomplished by enlarging the area of thelouvres 71 of the damper 77, or by any other means well known in theart. tion, the damper 77 will be moved to its open positionwhen theburner is inoperative by the draft in, the'fiue and which will be closedthereafter by the forced draft supplied by the burner when in operation.The louvres 71 of the frame 77 may also-be operated to open or partlyopen position when the burner is in operation if the force of the draftin the flueexceeds the air supply of the burner..

As above described, the burner is completely sealed within the fire box"of the furnace and the air supplied thereto'must necessarily passthrough the damper 67 to supply the air, both for atomization andcombustion. It will thus be seen that when the burner is not operating,the louvres 71 of the damper 67 will be in their closed position and thelouvres 71 in the damper 77 will be operated by the natural draft of theflue, by which means the said natural draft will be completely cut offfrom the furnace and the heat stored therein will not be lost ordissipated b the natural draft that is usually present in burnersheretofore employed in the art and which passes directly through thefire box containing the stored heat. 'By this arrangement my dampersystem will prevent the excessive draft, that will be present in extrahigh or large fiues, from cooling the combustion chamber while theburner is in operation. By such an arrangement of my dampers I procure agreat saving in the amount of the fuel also connected to the wall of thetank 78 to i With this construe provide an outlet for the air, orinlet'thereto, as the case may be as the oil is supplied to or removedfrom the tank 78. A supply line 85 is rovided from the bottom of thetank 78 at 86 and is connected to an anti-siphon device 87, from whichit passes through the line 88 located within the cellar 89, to the twinoil pump 45. The preferred form of anti-siphon device is that in whichno valve iseinployed' and which automatically 0pcrates to cut off theoil supply when the system is siphoning. Such valves are well known inthe art and as the structure thereof forms no part of the presentinvention, it will not be described.

An oil line 92 is provided connected to the return side of the twin pump45 and extends to the top of thetank 78, as at 93. The object of thereturn line 92 is to providea passage for the excess oil that is beingsupplied by the twin pump 45 and which overflows into the extension 49and the connection 60 and is returned to. the tank by the return side ofthe pump 45 and the line 92. This return of 15 the oil keeps the supplywithin the tank 45 as aforesaid is of greater capacity than wouldordinarily be required, so that the oil at all times is being passed toand from the tank 7 8. Thus, a supply of uniform viscosity will be hadat all times for the burner, so

that'the' regulation thereof will remain uniform throughout the entireuse of one complete tank of oil. 7

Any methods of electrical control may be provided for protection and forregulating the heat of the furnace. The system herein shown is apreferred arrangement in which a motor operated switch 94 is actuated toon or off position by the contact in the thermostat 95. The thermostat95 may be of any desired type well known in the art and is located in aposition within the house wherein uniform temperature is desired. Thlsarrangement causes the furnace to be operated intermittently to keep thespace to be heated within certain predetermineddegrees of temperature.The temperature desired is set on the thermostat 95 and may be changedfrom time to time to correspond with the various changes in temperaturethroughout the year.

A thermostat control 96 is provided within the furnace walls as a safetydevice to cut off the burner when the temperature of the walls havepassed an allowable rise in temperature. For the same purpose, athermostat-control or cut-off 97 is provided in fine 98 which alsooperates tci cut off the burner when the temperature of the flue haspassed a similar safe range.

Switch box 100 is provided as a means of control for the system. Hereinthe main switch is located as well as the fuses and other safety devicesthat may be emplo ed for the protection of the system. Cond uit 101 isemployed to connect the box to the switch and to the burner and toprotect the wires carried therewithin.

The n1otr.)r-opera.-ted switch 94 is first actuated by the contacts ofthe thermostat 95 which actuation revolves the switch 180 degrees makingcontact with the burner motor and with the transformer 64. After about90 seconds the transformer is disconnected; and if the burner has failedto ignite the switch motor operates to cut off the burner motor from thecircuit and the burner is again in a completely inoperative position.

However, if the fuel of the burner is ignited before the 90 seconds,after which the transformer is cut off, the burner will continue to beoperated until the temperature of the room containing the thermostat 95again causes the circuit to be broken or which is caused to be broken bythe operation of the other thermostats, above mentioned, to shut downthe burner.

When the circuit-is completed to the burner motor comprising the stator2 and rotor 3, its operation revolves the shaft 4 that actuates the twinpump 45, the fans or blade members 14 and 18 and the atomizing cup 26.-As the air is drawn through the rear of the casing 1 by the aforesaidblade members, a reduced pressure area is formed in the upper areaportion of this casing that operates through the aperture 50 to rarifythe area of the chamber 46. The inrush of passes about the rotor andstator of the said motor into the compression chambers 10 and 11 throughwhich it passes in different stages of compression through the airsupply passages 13 and 35, respectively. The rarified area in thechamber 46 located above the level of the oil contained in the well 54thereof causes the level of the oil to be raised due to the greaterpressure on the surface of the oil 'in the leveling chamber 48. Thelevel of the'oil thus obtained in the chamber 46 is raised to engage thebeveled side 42 of the hub 41, which throws the oil due to centrifugalforce into the slotted section 51 from which it flows by gravity throughthe conducting oil passage 52 and 53 into the annular orifice 55 fromwhich it flows'along the side of the atomizing cup 26 and is throwncentrifugally therefrom into the air supplied from the passage 13. Theelectrodes 61 and 62 are located directly in the path of the atomizedfuel, thus. obtains, and readily pr'ocures, its ignition. The air supplyin the passage 13 isemployed both for atomizing and for combustion butto insure a sufficient amount of oxygen for complete combustion underall conditions, additional air is supplied throughthe secondary airpassage 35,

'air past the damper 75 in the passage 76 which passage contains dampermeans 40 so, that the supply required to be added to the airof thepassage 13 may be regulated to fit all conditions that are encounteredin different installations of my burner.

One may observe thatmy burner has been invented with the object ofreducing the servicing thereof to the minimum. It, will be noted themotor is kept cool to-prevent it being burnt out from continuedoperation, that the supply line contains no valves or other means thatmay cause a stoppage therein and that the electrodes are placed in anair stream so that they will not be destroyed due to theircloseproXimity to the flame. In order that the wearing parts, that isthe bearings 5 and 6, may have an equally long life requiring noattention, I have providedoil reservoirs 56 and 57 to supply oilthereto. These reservoirs are of the wick type and are connected by anoil supply line 102 to a reservoir 103 located adjacent to the burner.The reservoir 103 is fill-ed with a lubricating oil when the burner isfirst put in service and should contain suflicient lubrieating oil tolubricate the bearings 5 and 6 for an exceedingly long period of time.

It will thus be seen that I have constructed an oil burner that shouldrun for an exceedingly long period without requiring any attentionwhatsoever in order to have it operate correctly at all times. I haveaccomplished this longevity by supplying the oil to the atomizing cupwithout having it pass through a single annular orifice or obstructionthat would in time clog the line and reduce the oil supply to thecombustion chamber. I have accomplished this by my novel leveling devicethat requires no valve "and also by my novel means of supplying oil tothe atomizing cup and completely disconnecting the supply therefromwithout employing a single obstruction in the supply line.

a My invention is further novel in supplying air for combustion in twostages of comression, the higher stage being employed or propelling theatomized fuel and to supply some of the air for combustion; the lowerstage containing the regulating means for supplying the remainder of theair that may be required. By this method of so having the burner supplyall of the air required for fuel propulsion and for combustion, I amable to-completely seal my burner in the walls of the combustion chamberwhich is thereby completely out off from the outside atmosphere andwhich will receive no air except that which is supplied through my novelburner.

By so installing my burner in the firebox of a furnace, I am able tooperate it at a great saving by utilizing all of the heat produced by myburner by shutting it off from all drafts or passages of air when theburner is inoperative. I accomplish this by enclos- 1,au,sse

ing the burner in a casing in which an auto.-

matic damper is arranged that will be open when the burner is inoperation and closed when the burner is shutoff. A similar damp- I er isarranged in the flue connected to the combustion chamber and is actuatedto open position by the draft in the flue when the damper in the casingof the burner iscl osed.

tained therein as stored heat to later give up to retain the temperatureof the its energy; spaces to be heated. The natural draft in the chimneyinstead of causing air to pass from the heated surface of thecombustionis means, the heat stored up'in the comchamber, opens the damper in theflue and passes air therethrough from a source exterior of thecombustion chamber.

My burner is further novel in employing the cool air in the secondary orlow compression air passage to cool the electrodes that I employ toignite the fuel of my burner.

I do not wish to be restricted'to the par ticular structure herein shownas many changes, additions, subtractions, substitutions and arrangementsmay be made as would be apparent to anyone skilled in the art. Itherefore wish my invention to be limited only by the scope of theappended claims and the prior art.

I claim as my invention:

1. The combination with a liquid fuel burner having a motor, .amechanical fuel atomizer driven thereby and an air compressor driventhereby for supply'in air for sustaining combustion of the fuel, 0 agravity means for supplying fuel to the said atomizer, a meansconstantly driven by the motor for delivering fuel to the gravity meansand means for varying the degree of effectiveness of'the fuel deliveringmeans.

2. Aliquid fuel burner having a motor, an atomizer and an oil-throwingmember driven thereby, a container for a body of oil surrounding saidmember and having an outlet for catching oil thrown by the rotatingmember after dipping, in said body of oil, and means for conducting oilfrom said outlet to said atomizer.

A liquid fuel burner having a motor, an atomizer and a disk driventhereby, a container for a body of oil partly immersing said disk andhaving an outlet for receiving oil thrown ofi said disk by centrifugalforce, and gravitymeans for conducting oil .from said outlet to saidatomizer.

4. A liquid fuel burner having a motor, an atomizer, a fan and anoil-throwing mem- 'ber driven thereby, a container for a body of oilsurrounding said member and having an outlet for catching oil tli rownthereby, means to permit air to be withdrawn from said casing by saidfan, therebyto permit the level of said body of oil to raise to contactsaid member when said motor operating, and

means for conducting oil from the first-named outlet to said atomizerv5. A liquid fuel burner having a motor, an atomizer, a fan and a driventhereby, a container for a body of oil enclosing said disk and having anoutlet for receiving oil thrown ofi said disk by centrifugal force,means for permitting a flow of oil into and out of said casing, saidcasing having a second outlet to permit air to be Withdrawn there fromby the action of said fan, thereby to permit the level of said body ofoil to raise to contact said member when said motor is operating, andgravity means for conducting oil from the first-named outlet to saidatomizer to permit a stream of air from said fan to act thereupon.

In testimony whereof, I have hereunto subscribed my name this 27th dayof March,

FRANK CORNELIUS.

